Washington -LRB- CNN -RRB- -- Sen. Mark Udall accused the CIA of `` lying '' about the effectiveness of torture , called for the resignation of its director and blasted President Barack Obama 's handling of the spy agency on the Senate floor Wednesday .

In a 48-minute speech , the Colorado Democrat called on Obama to `` purge his administration '' of CIA officials , including Director John Brennan , involved in the interrogation techniques detailed in a new Senate Intelligence Committee report .

He also revealed what he called the `` key findings and conclusions '' of an internal CIA review commissioned by former director Leon Panetta -- which the Obama administration has not publicly released .

`` Director Brennan and the CIA today are continuing to willfully provide inaccurate information and misrepresent the efficacy of torture , '' Udall said . `` In other words : The CIA is lying . ''

White House Press Secretary Josh Earnest defended Brennan on Wednesday , telling reporters that he has done an `` exemplary job '' and that Obama is `` pleased to rely on his advice . ''

Udall 's comments came the day after Senate Intelligence Committee Chairwoman Dianne Feinstein -LRB- D-Calif . -RRB- released an explosive report detailing the rough techniques the CIA used to interrogate detainees under President George W. Bush .

The report suggests those techniques -- including mock executions , sleep deprivation , beating detainees , feeding them rectally and threatening the lives of their families -- produced faulty intelligence . It also said the CIA misled Congress and the White House .

But Brennan pushed back , acknowledging in a statement that the CIA made `` mistakes '' but saying those techniques `` did produce intelligence that helped thwart attack plans , capture terrorists , and save lives . The intelligence gained from the program was critical to our understanding of al-Qa ` ida and continues to inform our counterterrorism efforts to this day . ''

Udall -- who lost his re-election bid in November and is leaving office in just weeks -- said he was frustrated with those comments Wednesday , and repeated his previous call for Brennan 's resignation .

He also accused Obama of failing to live up to his pledges during the 2008 campaign to be more transparent about the use of torture . And he said the CIA 's internal Panetta review 's findings reveal that the White House is misleading the public .

`` One would think this administration is leading the effort to right the wrongs of the past and ensure the American people learn the truth about the CIA 's torture program , '' Udall said . `` Not so . It 's been nearly a six-year struggle in a Democratic administration to get this study out . For a while I worried that this administration would succeed in keeping this study entirely under wraps .

`` While the study clearly shows that the CIA detention and interrogation program itself was deeply flawed , the deeper , more endemic problem lies in the CIA , assisted by a White House that continues to try to cover up the truth . ''

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Sen. Mark Udall accused the CIA of `` lying '' about the effectiveness of torture on the Senate floor

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His comments come the day after a Senate panel released a report on CIA interrogation techniques

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Udall called for the resignation of CIA Director John Brennan